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    <script type="text/javascript">
        //   数组的解构赋值：
        //   允许我们按照一一对应的关系，从数组中提取出来，然后赋值给变量
        let arr = [1, 2, 3]

        let a = arr[0]
        let b = arr[1]
        let c = arr[2]

        console.log(a, b, c);
        // 等价写法
        let [x, y, z] = arr;
        console.log(x, y, z);
    </script>
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